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A developer notices that the Cumulative Layout Shift (CLS) score is unusually high. Which of the following changes would most likely reduce the CLS?

medium📝 Analysis Q7 of 15
SEO Fundamentals - Technical SEO Basics
A developer notices that the Cumulative Layout Shift (CLS) score is unusually high. Which of the following changes would most likely reduce the CLS?
AReserve space for ads and images using size attributes
BOptimize images to load faster
CMinimize JavaScript execution time
DReduce server response time
Step-by-Step Solution
Solution:

  1. Step 1: Identify cause of high CLS

    High CLS is caused by unexpected layout shifts due to missing space for elements.

  2. Step 2: Choose solution

    Reserving space with size attributes prevents layout shifts, reducing CLS.

  3. Final Answer:

    Reserve space for ads and images using size attributes -> Option A

  4. Quick Check:

    Reserved space reduces CLS [OK]
Quick Trick: Reserve space to avoid layout shifts [OK]
Common Mistakes:
  • Optimizing images affects LCP, not CLS
  • Minimizing JS affects FID
  • Reducing server time affects load speed

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